A screw pair loading test device

Abstract

The application discloses a screw pair loading test device, and relates to the technical field of dynamic balance loading test of screw pairs. In the process of performing dynamic balance loading test on the screw pair on the electric cylinder, the mutual cooperation of the test assembly, the identification assembly, the loading assembly and the transmission assembly is used to determine whether the dynamic balance test of the screw pair is abnormal. In the whole test process, the test is performed after the electric cylinder is assembled, the actual extension and contraction of the telescopic rod and the working state of the screw pair operation can be simulated, the problem that the separate test of the screw pair is disconnected with the actual assembly state is avoided, the test result is closer to the real use scene, in addition, in the whole test process, the different positions of the telescopic rod can be detected and identified through transmission, and the scene of the load of the telescopic rod in the transmission process of the screw pair can be simulated, so that the actual working condition is met in the whole test process, and the accuracy of the test result is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of screw pair dynamic balance loading test, in particular to a screw pair loading test device. BACKGROUND

[0002] During use, the screw pair as the rotary driving part of the telescopic rod will generate periodic centrifugal force (unbalanced force) when rotating at high speed if there is uneven mass distribution (such as manufacturing error, assembly eccentricity, etc.), which will cause vibration of the screw itself and the whole electric cylinder. This vibration not only produces noise, but also may couple with the natural frequency of the electric cylinder or the device, causing resonance, leading to structural looseness, component fatigue damage (such as screw bending, bearing wear aggravation), and even affecting the stability of the entire device system. Therefore, after the production and assembly of the electric cylinder are completed, the screw pair on the electric cylinder needs to be dynamically balanced and loaded for testing.

[0003] During the dynamic balance loading test of the screw pair, the traditional method is to install the screw monomer on the balancing machine for testing. The test is the dynamic balance of the single screw pair, but the whole dynamic balance may still fail after the screw pair is assembled on the electric cylinder due to the eccentricity of the motor shaft and the screw, the excessive bearing clearance and other assembly problems, which will cause vibration. Therefore, the existing test cannot reflect the dynamic balance characteristics of the screw pair in the "whole assembly state". Therefore, we propose a screw pair loading test device. SUMMARY

[0004] The purpose of the present application is to provide a screw pair loading test device to solve the problems raised in the background.

[0005] To achieve the above purpose, the present application provides the following technical scheme: a screw pair loading test device, comprising an operation table for dynamic balance loading test of the screw pair, the operation table is fixed with a mounting rack, the mounting rack is installed with an electric cylinder, the front end of the electric cylinder is slidingly connected with a telescopic rod, the screw pair is arranged in the electric cylinder and is used for driving the telescopic rod to extend and retract, further comprising:

[0006] A test assembly is arranged on the operation table for dynamic balance test of the screw pair.

[0007] An identification assembly is arranged on the test assembly for detection and identification during the test.

[0008] A loading assembly is arranged on the test assembly for loading the screw pair during the test.

[0009] In addition, a transmission assembly is arranged between the identification assembly and the loading assembly for transmission during the identification.

[0010] Preferably, the test assembly comprises a test frame arranged on an operation table, the operation table is provided with an adjusting assembly for adjusting the use position of the test frame, an installation frame is fixed in the test frame, a circular frame is rotatably connected to the installation frame, the identification assembly is provided in multiple groups, and the multiple groups of identification assemblies are arranged in a ring array state in the circular frame, the test frame is provided with a rotating assembly for rotating the circular frame, and a linkage assembly for assisting linkage is arranged between the loading assembly and the rotating assembly.

[0011] By adopting the above technical scheme, the vibration of the telescopic rod is tested.

[0012] Preferably, the identification assembly comprises a connecting plate arranged in the inside of the circular frame, a telescopic assembly for assisting telescopic connection is arranged between the connecting plate and the inner wall of the circular frame, a circular plate is connected to the connecting plate through an elastic assembly, a detection rod is fixed to the circular plate, a ball is rotatably connected to the front end of the detection rod through a spherical groove, the ball is used for abutting and pressing the outside of the telescopic rod, and a vibration identification sensor is installed on the circular plate for vibration identification.

[0013] By adopting the above technical scheme, when the vibration identification sensor on the circular plate detects vibration, it is judged that the dynamic balance detection of the screw pair is abnormal, and the dynamic balance test of the screw pair is realized.

[0014] Preferably, the telescopic assembly comprises a plurality of first sleeves fixed to the connecting plate, a first sliding rod is slidably connected to the first sleeve, and one end of the first sliding rod is fixed to the inner wall of the circular frame.

[0015] By adopting the above technical scheme, the movement of the connecting plate after being stressed can be telescoped and guided.

[0016] Preferably, the elastic assembly comprises a plurality of second sleeves fixed to the circular plate, a second sliding rod is slidably connected to the second sleeve, one end of the second sliding rod is fixed to the connecting plate, a first spring is sleeved outside the second sleeve, and both ends of the first spring are connected to the circular plate and the connecting plate.

[0017] By adopting the above technical scheme, the ball at the front end of the detection rod can better abut the outside of the telescopic rod.

[0018] Preferably, the loading assembly comprises a rectangular frame centrally arranged inside the circular frame, the inner side of the rectangular frame is rotationally connected with a push plate for abutting against the end of the telescopic rod, the inside of the test frame is provided with a rectangular plate, a plurality of third sleeves are fixed on the rectangular plate, one end of the third sleeve is fixed with the push plate, the other end of the third sleeve is slidably connected with a third slide rod, one end of the third slide rod is fixed with the inner wall of the test frame, the outer side of the third sleeve is sleeved with a second spring for load transmission, and the two ends of the second spring are respectively abutted against the inner wall of the test frame and the rectangular plate.

[0019] By adopting the above technical scheme, the load scenario of the telescopic rod transmission process of the screw pair is simulated, the actual working condition is matched during the whole test process, and the accuracy of the test experimental result is improved.

[0020] Preferably, the transmission assembly is arranged between the rectangular frame and the identification assembly, the transmission assembly comprises a transmission plate slidably connected inside the circular frame, one end of the transmission plate is fixed with the outer side of the rectangular frame, a inclined groove is formed in the transmission plate, a transmission pin is slidably connected in the inclined groove, a connecting frame is fixed on the connecting plate, and the transmission pin is fixed on the connecting frame.

[0021] By adopting the above technical scheme, the force of each group of connecting plates is driven to move, in the process of the movement of the connecting plate, the guiding effect of the telescopic assembly on the stressed connecting plate makes each group of connecting plates after stress move towards the outer side of the telescopic rod, in the process of the movement, the connecting effect of the elastic assembly drives the ball at the front end of the detection rod on the circular plate to abut against the outer side of the telescopic rod.

[0022] Preferably, the rotating assembly comprises a worm wheel fixed on the outer side of the circular frame, the inside of the test frame is rotationally connected with a mounting shaft, the mounting shaft is fixed with a worm, and the worm and the worm wheel are arranged in meshing relationship; the linkage assembly comprises a gear fixed on the mounting shaft, the rectangular plate is fixed with a rack, and the gear and the rack are arranged in meshing relationship;

[0023] By adopting the above technical scheme, the ball at the front end of the detection rod abuts against the outer side of the telescopic rod while rotating around the outer side of the telescopic rod, so that the vibration detection and identification of different positions on the outer side of the telescopic rod can be performed during the experimental test, and the accuracy of the dynamic balance test of the screw pair is ensured.

[0024] Preferably, the adjusting assembly comprises a mounting seat fixed on the operation table, one side of the mounting seat is provided with a connecting disc, the connecting disc and the test frame are detachably installed through bolts, and the mounting seat is installed with a cylinder for adjusting the use position of the connecting disc;

[0025] By adopting the technical scheme, the test frame moves above the operation table, and the distance between the test frame and the front end of the telescopic rod of the electric cylinder is adjusted through the movement of the test frame.

[0026] Compared with the prior art, the present application has the following advantages:

[0027] In the process of dynamic balance loading test of the screw pair on the electric cylinder, the test assembly, the identification assembly, the loading assembly and the transmission assembly cooperate with each other to determine whether the dynamic balance detection of the screw pair is abnormal. The test is performed after the electric cylinder is assembled, which can simulate the actual extension and contraction of the telescopic rod and the working state of the screw pair, avoids the problem that the separate test of the screw pair is disconnected with the actual assembly state, and the test result is closer to the real use scene. In addition, in the whole test process, the transmission can detect and identify different positions of the telescopic rod, and can also simulate the load scene of the telescopic rod in the transmission process of the screw pair, so as to realize the actual working condition in the whole test process and improve the accuracy of the test result. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall shape structure of the present application;

[0029] Figure 2 It is a schematic diagram of the structure of the electric cylinder and the operation table of the present application;

[0030] Figure 3 It is a schematic diagram of the position relationship between the screw pair and the electric cylinder of the present application;

[0031] Figure 4 It is a schematic diagram of the telescopic assembly structure of the present application;

[0032] Figure 5 It is a schematic diagram of the test assembly structure of the present application;

[0033] Figure 6 It is a schematic diagram of the position relationship between the identification assembly and the circular frame of the present application;

[0034] Figure 7 It is a schematic diagram of the rotation assembly and the linkage assembly structure of the present application;

[0035] Figure 8 It is a schematic diagram of the position relationship between the loading assembly and the identification assembly of the present application;

[0036] Figure 9 It is a schematic diagram of the structure of the identification assembly, the telescopic assembly and the elastic assembly of the present application;

[0037] Figure 10 It is a schematic diagram of the structure of the transmission assembly and the loading assembly of the present application;

[0038] Figure 11 This is a schematic diagram of the identification component of the present invention before detection;

[0039] Figure 12 This is a schematic diagram of the identification component of the present invention detecting the state after transmission.

[0040] In the diagram: 101-Operating table; 102-Mounting frame; 103-Electric cylinder; 104-Telescopic rod; 201-Test frame; 202-Mounting frame; 203-Circular frame; 301-Mounting base; 302-Cylinder; 303-Connecting plate; 401-Connecting plate; 402-Circular plate; 403-Detection rod; 404-Ball bearing; 501-First sleeve; 502-First slide rod; 601-Second sleeve ; 602-Second slide bar; 603-First spring; 701-Rectangular frame; 702-Push plate; 703-Rectangular plate; 704-Third sleeve; 705-Third slide bar; 706-Second spring; 801-Transmission plate; 802-Inclined groove; 803-Transmission pin; 804-Connecting frame; 901-Worm gear; 902-Mounting shaft; 903-Worm; 1001-Rack; 1002-Gear. Detailed Implementation

[0041] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0042] Example 1: Please refer to Figures 1-12 The figure shows a screw pair loading test device, including an operating table 101 for dynamic balance loading test of the screw pair, a mounting frame 102 fixed on the operating table 101, an electric cylinder 103 mounted on the mounting frame 102, a telescopic rod 104 slidably connected to the front end of the electric cylinder 103, and the screw pair is disposed inside the electric cylinder 103 and used to drive the telescopic rod 104 to extend and retract.

[0043] It should be noted here that during the dynamic balance loading test of the lead screw pair on the electric cylinder 103, the lead screw pair to be tested is assembled and installed inside the electric cylinder 103 according to the design requirements. After the installation is completed, the entire electric cylinder 103 is installed on the mounting bracket 102 and the telescopic rod 104 on the electric cylinder 103 is set towards the test frame 201. The installation of the lead screw pair inside the electric cylinder 103 and the installation of the electric cylinder 103 on the mounting bracket 102 are conventional technical means in this application. Their working principle and operation method are known technologies and will not be described in detail here.

[0044] Also includes:

[0045] The test assembly is set on the control panel 101 for testing the dynamic balance of the lead screw pair;

[0046] The identification component is set on the test component for detection and identification during the test process;

[0047] Loading component, set on the test component for loading the lead screw pair during the test process;

[0048] And, a transmission component disposed between the identification component and the load component for transmission during the identification process;

[0049] It should be noted that during the dynamic balance loading test of the lead screw pair on the electric cylinder 103, the test components, identification components, loading components, and transmission components work together to determine whether there are any abnormalities in the dynamic balance detection of the lead screw pair. The entire test is conducted after the electric cylinder 103 is assembled, which can simulate the actual extension and retraction of the telescopic rod 104 and the working state of the lead screw pair. This avoids the problem of the lead screw pair being out of sync with the actual assembly state when tested alone, and the test results are closer to the real use scenario. In addition, during the entire test, the transmission can detect and identify different positions of the telescopic rod 104, and can also simulate the load scenario during the transmission of the lead screw pair to the telescopic rod 104. This ensures that the entire test process closely matches the actual working conditions and improves the accuracy of the test results.

[0050] Preferably, the test component includes a test frame 201 disposed on the operating table 101, an adjustment component disposed on the operating table 101 for adjusting the position of the test frame 201, a mounting frame 202 fixed inside the test frame 201, a circular frame 203 rotatably connected to the mounting frame 202, multiple sets of recognition components disposed in a circular array inside the circular frame 203, a rotation component disposed on the test frame 201 for rotating the circular frame 203, and a linkage component for auxiliary linkage disposed between the loading component and the rotation component;

[0051] It should be noted here that the vibration of the telescopic rod 104 is tested using the test assembly.

[0052] Preferably, the identification component includes a connecting plate 401 disposed inside the circular frame 203, a telescopic component for assisting telescopic connection is disposed between the connecting plate 401 and the inner wall of the circular frame 203, a circular plate 402 is connected to the connecting plate 401 by an elastic component, a detection rod 403 is fixed on the circular plate 402, the front end of the detection rod 403 is rotatably connected to a ball bearing 404 for pressing against the outside of the telescopic rod 104 through a spherical groove, and a vibration identification sensor for vibration identification is installed on the circular plate 402;

[0053] It should be noted here that: through transmission, the ball 404 at the front end of the detection rod 403 on the circular plate 402 abuts against the outer side of the telescopic rod 104, and the abutting effect is ensured under the elastic force of the elastic component. During the abutting process, the movement of the telescopic rod 104 is driven by the lead screw pair. As a rotating component, if there is uneven mass distribution in the lead screw pair, it will cause the inertial axis and geometric rotation axis to not coincide. This deviation will generate periodic centrifugal force and cause the telescopic rod 104 to vibrate radially and axially during the transmission process. Since the ball 404 at the front end of the detection rod 403 keeps abutting against the outer side of the telescopic rod 104, the vibration of the telescopic rod 104 will drive the detection rod 403 and the circular plate 402 to vibrate. When the vibration recognition sensor on the circular plate 402 detects the vibration, it is determined that the dynamic balance detection of the lead screw pair is abnormal, thus realizing the dynamic balance test of the lead screw pair.

[0054] It is worth noting here that the vibration recognition sensor is a conventional component for vibration detection and recognition in this application. Its working principle and operation method are well-known technologies and will not be described in detail here.

[0055] Preferably, the telescopic assembly includes multiple sets of first sleeves 501 fixed on the connecting plate 401, and a first slide rod 502 slidably connected to the first sleeve 501, with one end of the first slide rod 502 fixed to the inner wall of the circular frame 203;

[0056] It should be noted here that the first sleeve 501 and the first slide rod 502 facilitate the extension and retraction guidance of the connecting plate 401 after being subjected to force.

[0057] Preferably, the elastic component includes multiple sets of second sleeves 601 fixed on the circular plate 402, a second slide rod 602 slidably connected to the second sleeve 601, one end of the second slide rod 602 being fixed to the connecting plate 401, and a first spring 603 being sleeved on the outside of the second sleeve 601, with both ends of the first spring 603 being connected to the circular plate 402 and the connecting plate 401 respectively.

[0058] It should be noted that after the ball bearing 404 at the front end of the detection rod 403 abuts against the outer side of the telescopic rod 104, the continued driving action on the connecting plate 401 and the limiting action of the outer side of the telescopic rod 104 against the detection rod 403 and the circular plate 402 cause the connecting plate 401 to retract towards the circular plate 402. During the retraction movement, the second slide rod 602 is pushed to slide on the second sleeve 601, and the first spring 603 is deformed by force to generate elastic force. Through the elastic force of the first spring 603, the ball bearing 404 at the front end of the detection rod 403 can better maintain abutment against the outer side of the telescopic rod 104.

[0059] Preferably, the loading component includes a rectangular frame 701 centrally located inside the circular frame 203. The inner side of the rectangular frame 701 is rotatably connected to a push plate 702 for abutting against the end of the telescopic rod 104. A rectangular plate 703 is provided inside the test frame 201. Multiple sets of third sleeves 704 are fixed on the rectangular plate 703. One end of the third sleeve 704 is fixed to the push plate 702, and the other end of the third sleeve 704 is slidably connected to a third slide rod 705. One end of the third slide rod 705 is fixed to the inner wall of the test frame 201. A second spring 706 for load transmission is sleeved on the outer side of the third sleeve 704. The two ends of the second spring 706 abut against the inner wall of the test frame 201 and the rectangular plate 703, respectively.

[0060] It should be noted that during the process of pushing the push plate 702 and the rectangular plate 703 by one end of the telescopic rod 104 against the push plate 702, the third slide rod 705 slides on the third sleeve 704 and the second spring 706 is deformed by force to generate elastic force. Through the elastic force of the second spring 706, resistance is generated on the movement of the rectangular plate 703, the push plate 702 and the telescopic rod 104. Through the resistance, the load scenario during the transmission of the telescopic rod 104 by the lead screw pair is simulated, so that the entire test process closely matches the actual working conditions and improves the accuracy of the test results.

[0061] Preferably, the transmission assembly is disposed between the rectangular frame 701 and the identification assembly. The transmission assembly includes a transmission plate 801 slidably connected inside the circular frame 203. One end of the transmission plate 801 is fixed to the outer side of the rectangular frame 701. A slanted groove 802 is provided on the transmission plate 801. A transmission pin 803 is slidably connected to the slanted groove 802. A connecting frame 804 is fixed on the connecting plate 401. The transmission pin 803 is fixed on the connecting frame 804.

[0062] It should be noted here that: driven by the lead screw pair, the telescopic rod 104 extends towards the test frame 201 via the electric cylinder 103. During the movement of the telescopic rod 104, one end of the telescopic rod 104 passes through the interior of the test frame 201 and between the various identification components. During this passage, one end of the telescopic rod 104 abuts against the push plate 702 on the rectangular frame 701. After abutting, with the continued movement of the telescopic rod 104 and the abutting action between the push plate 702 and one end of the telescopic rod 104, the rectangular frame 701 and the push plate 702 on the rectangular frame 701 move synchronously with the movement of the telescopic rod 104. During the movement of the rectangular frame 701, it drives the synchronous movement of each group of transmission plates 801. During the movement of the transmission plates 801, through the interaction between the inclined groove 802 and the transmission pin 803 and the connection of the connecting frame 804, each group of connecting plates 401 is driven to move under force. During the movement of the connecting plates 401, through the guiding effect of the telescopic component on the connected plates 401 after being subjected to force, each group of connecting plates 401 after being subjected to force moves towards the outside of the telescopic rod 104. During the movement, through the connection effect of the elastic component, the ball 404 at the front end of the detection rod 403 on the circular plate 402 abuts against the outside of the telescopic rod 104.

[0063] Preferably, the rotating assembly includes a worm gear 901 fixed to the outside of the circular frame 203, a mounting shaft 902 rotatably connected inside the test frame 201, a worm 903 fixed on the mounting shaft 902, and the worm 903 and the worm gear 901 meshing with each other; the linkage assembly includes a gear 1002 fixed on the mounting shaft 902, a rack 1001 fixed on the rectangular plate 703, and the gear 1002 and the rack 1001 meshing with each other;

[0064] It should be noted that during the testing process, as one end of the telescopic rod 104 abuts against the push plate 702, pushing the push plate 702 to move, the rectangular plate 703 moves synchronously through the connection of the third sleeve 704. During the movement of the rectangular plate 703, the rack 1001 moves. During the movement of the rack 1001, the meshing transmission between the rack 1001 and the gear 1002 drives the mounting shaft 902 and the worm gear 903 on the mounting shaft 902 to rotate. During the rotation of the worm gear 903, the worm gear 902... The meshing transmission between the worm gear 901 and the circular frame 203 causes the circular frame 203 to rotate on the mounting frame 202 under force. During the rotation of the circular frame 203, the identification component is driven to rotate synchronously through the connecting action of the telescopic component. The rotation of the identification component causes the ball 404 at the front end of the detection rod 403 to remain in contact with the outside of the telescopic rod 104 while rotating around the outside of the telescopic rod 104. This allows vibration detection and identification at different positions on the outside of the telescopic rod 104 during the experimental test, ensuring the accuracy of the dynamic balance test of the lead screw pair.

[0065] Preferably, the adjustment component includes a mounting base 301 fixed on the operating table 101, a connecting plate 303 is provided on one side of the mounting base 301, the connecting plate 303 is detachably installed with the test frame 201 by bolts, and a cylinder 302 for adjusting the position of the connecting plate 303 is installed on the mounting base 301.

[0066] It should be noted here that: the movement of the connecting plate 303 by the cylinder 302 and the connection between the connecting plate 303 and the test frame 201 cause the test frame 201 to move above the operating table 101. The distance between the test frame 201 and the front end of the telescopic rod 104 on the electric cylinder 103 is adjusted by the movement of the test frame 201.

[0067] In this solution, a lead screw pair loading test device includes the following steps:

[0068] During the dynamic balance loading test of the lead screw pair on the electric cylinder 103, the lead screw pair to be tested is assembled and installed inside the electric cylinder 103 according to the design requirements. After the installation is completed, the entire electric cylinder 103 is installed on the mounting bracket 102 and the telescopic rod 104 on the electric cylinder 103 is set towards the test frame 201. After the installation is completed, the test frame 201 is moved above the operating table 101 by the movement of the connecting plate 303 by the cylinder 302 and the connection between the connecting plate 303 and the test frame 201. The distance between the test frame 201 and the front end of the telescopic rod 104 on the electric cylinder 103 is adjusted by the movement of the test frame 201.

[0069] After the electric cylinder 103 equipped with the lead screw pair to be tested is installed, the telescopic rod 104 is driven by the lead screw pair to extend towards the test frame 201 on the electric cylinder 103. During the movement of the telescopic rod 104, one end of the telescopic rod 104 passes through the interior of the test frame 201 and between the various identification components. During this passage, one end of the telescopic rod 104 abuts against the push plate 702 on the rectangular frame 701. After abutting, with the continued movement of the telescopic rod 104 and the abutting action between the push plate 702 and one end of the telescopic rod 104, the rectangular frame 701 and the components on the rectangular frame 701... The push plate 702 moves synchronously with the telescopic rod 104. During the movement of the rectangular frame 701, it drives the synchronous movement of each set of transmission plates 801. During the movement of the transmission plates 801, through the interaction between the inclined groove 802 and the transmission pin 803 and the connection of the connecting frame 804, each set of connecting plates 401 is driven to move under force. During the movement of the connecting plates 401, the telescopic assembly guides the force-bearing connecting plates 401, causing them to move towards the outside of the telescopic rod 104. During this movement, through the connection of the elastic assembly, the circular plate 4... 02 The ball bearing 404 at the front end of the upper detection rod 403 abuts against the outer side of the telescopic rod 104, and the abutment effect is ensured by the elastic force of the elastic component. During the abutment process, the movement of the telescopic rod 104 is driven by the lead screw pair. As a rotating component, if there is uneven mass distribution in the lead screw pair (such as material density deviation during manufacturing, machining eccentricity, or installation tilt during assembly, or misalignment with the motor shaft), it will cause the inertial axis of rotation to not coincide with the geometric axis of rotation. This deviation will generate periodic centrifugal force and cause the telescopic rod 104 to undergo radial and axial changes during the transmission process. Vibration occurs because the ball bearing 404 at the front end of the detection rod 403 remains against the outer side of the telescopic rod 104. The vibration of the telescopic rod 104 will cause the detection rod 403 and the circular plate 402 to vibrate. When the vibration recognition sensor on the circular plate 402 detects the vibration, it is determined that the dynamic balance of the lead screw pair is abnormal at this time, thus realizing the dynamic balance test of the lead screw pair. The entire test is carried out after the electric cylinder 103 is assembled. It can simulate the actual extension and retraction of the telescopic rod 104 and the working state of the lead screw pair, avoiding the problem of the lead screw pair being disconnected from the actual assembly state when tested separately. The test results are closer to the real use scenario.

[0070] During the detection process, as one end of the telescopic rod 104 abuts against the push plate 702, pushing the push plate 702 to move, the rectangular plate 703 moves synchronously through the connection of the third sleeve 704. During the movement of the rectangular plate 703, the rack 1001 moves. During the movement of the rack 1001, the meshing transmission between the rack 1001 and the gear 1002 drives the mounting shaft 902 and the worm 903 on the mounting shaft 902 to rotate. During the rotation of the worm 903, the meshing transmission between the worm 903 and the worm wheel 901 causes the circular frame 203 to rotate on the mounting frame 202. During the rotation of the circular frame 203, the identification component rotates synchronously through the connection of the telescopic assembly. The rotation of the identification component causes the front end of the detection rod 403 to rotate. While the ball bearing 404 remains abutting against the outer side of the telescopic rod 104, it rotates around the outer side of the telescopic rod 104. This allows for vibration detection and identification at different positions on the outer side of the telescopic rod 104 during the experimental test, ensuring the accuracy of the dynamic balance test of the lead screw pair. In addition, as one end of the telescopic rod 104 abuts against the push plate 702, pushing the push plate 702 and the rectangular plate 703 to move, the third slide rod 705 slides on the third sleeve 704, causing the second spring 706 to deform under force and generate elastic force. Through the elastic force of the second spring 706, resistance is generated on the movement of the rectangular plate 703, the push plate 702, and the telescopic rod 104. Through the resistance, the load scenario during the transmission of the lead screw pair to the telescopic rod 104 is simulated, so that the entire test process closely matches the actual working conditions and improves the accuracy of the test results.

[0071] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0072] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A screw pair loading test device, comprising: An operating table (101) for dynamic balancing load testing of a lead screw pair is provided. A mounting frame (102) is fixed on the operating table (101). An electric cylinder (103) is mounted on the mounting frame (102). A telescopic rod (104) is slidably connected to the front end of the electric cylinder (103). The lead screw pair is located inside the electric cylinder (103) and is used to drive the telescopic rod (104) to extend and retract. Its characteristic is that it further includes: The test assembly is set on the control panel (101) for testing the dynamic balance of the lead screw pair; The identification component is set on the test component for detection and identification during the test process; Loading component, set on the test component for loading the lead screw pair during the test process; And, a transmission component disposed between the identification component and the load component for transmission during the identification process; The test component includes a test frame (201) set on an operating table (101), an adjustment component for adjusting the position of the test frame (201) on the operating table (101), a mounting frame (202) fixed inside the test frame (201), a circular frame (203) rotatably connected to the mounting frame (202), multiple sets of recognition components are set in a circular array inside the circular frame (203), a rotating component for rotating the circular frame (203) is set on the test frame (201), and a linkage component for auxiliary linkage is set between the loading component and the rotating component; The identification component includes a connecting plate (401) disposed inside the circular frame (203). A telescopic component for assisting telescopic connection is disposed between the connecting plate (401) and the inner wall of the circular frame (203). A circular plate (402) is connected to the connecting plate (401) through an elastic component. A detection rod (403) is fixed on the circular plate (402). The front end of the detection rod (403) is rotatably connected to a ball (404) for pressing against the outside of the telescopic rod (104) through a spherical groove. A vibration identification sensor for vibration identification is installed on the circular plate (402). The loading component includes a rectangular frame (701) centrally located inside the circular frame (203). The inner side of the rectangular frame (701) is rotatably connected to a push plate (702) for abutting against the end of the telescopic rod (104). The interior of the test frame (201) is provided with a rectangular plate (703). Multiple sets of third sleeves (704) are fixed on the rectangular plate (703). One end of the third sleeve (704) is fixed to the push plate (702), and the other end of the third sleeve (704) is slidably connected to a third slide rod (705). One end of the third slide rod (705) is fixed to the inner wall of the test frame (201). A second spring (706) for load transmission is sleeved on the outer side of the third sleeve (704). The two ends of the second spring (706) abut against the inner wall of the test frame (201) and the rectangular plate (703), respectively. The transmission assembly is disposed between the rectangular frame (701) and the identification assembly. The transmission assembly includes a transmission plate (801) slidably connected inside the circular frame (203). One end of the transmission plate (801) is fixed to the outside of the rectangular frame (701). A slanted groove (802) is provided on the transmission plate (801). A transmission pin (803) is slidably connected on the slanted groove (802). A connecting frame (804) is fixed on the connecting plate (401). The transmission pin (803) is fixed on the connecting frame (804).

2. The lead screw pair loading test device according to claim 1, characterized in that: The telescopic assembly includes multiple sets of first sleeves (501) fixed on the connecting plate (401), and a first slide rod (502) is slidably connected on the first sleeve (501). One end of the first slide rod (502) is fixed to the inner wall of the circular frame (203).

3. The lead screw pair loading test device according to claim 1, characterized in that: The elastic component includes multiple sets of second sleeves (601) fixed on a circular plate (402). A second slide rod (602) is slidably connected to the second sleeve (601). One end of the second slide rod (602) is fixed to the connecting plate (401). A first spring (603) is sleeved on the outside of the second sleeve (601). The two ends of the first spring (603) are respectively connected to the circular plate (402) and the connecting plate (401).

4. The lead screw pair loading test device according to claim 1, characterized in that: The rotating assembly includes a worm gear (901) fixed to the outside of the circular frame (203), and an installation shaft (902) is rotatably connected inside the test frame (201). A worm (903) is fixed on the installation shaft (902), and the worm (903) and the worm gear (901) are meshed with each other.

5. The lead screw pair loading test device according to claim 4, characterized in that: The linkage component includes a gear (1002) fixed on the mounting shaft (902), and a rack (1001) fixed on the rectangular plate (703). The gear (1002) and the rack (1001) are meshed with each other.

6. The lead screw pair loading test device according to claim 1, characterized in that: The adjustment assembly includes a mounting base (301) fixed on the operating table (101), a connecting plate (303) is provided on one side of the mounting base (301), the connecting plate (303) is detachably installed with the test frame (201) by bolts, and a cylinder (302) for adjusting the position of the connecting plate (303) is installed on the mounting base (301).

Images